[time-nuts] 50/60 Hz clocks

Cezary Rozluski cpr at igf.edu.pl
Thu Mar 10 21:54:37 UTC 2011


It perhaps the old story it is difficult for 
non-continental Americans have opportunities to 
buy valuable time-nuts equipment such as e.g. 
‘Hewlett Packard Vintage Digital Clock Model 115BR-HO8’ seen on ebay recently


To temporary cheer up (?) myself I found (and 
bought) available on local (European) market nice 
COPAL flip-clock with witch is identical to that 
one shown on an ended ebay auction 
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=230590647002+ 
I refer to only for purpose of image of the 
clock, so please forgive me link to auction on ebay.com

As the clock mentioned above has very nice 
seconds dial I revisited outstanding pages: 
http://www.leapsecond.com/pages/atomic-nixie/

Well – it is nice solution presented, but I would 
like ask you what would be from time-nuts 
perspective simple (the simplest ?)  solution to 
drive such 50/60 Hz clocks without to much 
overweighed stuff (and of course without 
modifying the clock itself addig e.g step motor etc, etc).

As an overweight I would consider driving from 
industry function/arbitrary generators and nice 
but pretty rare and expensive on European market  HP 6827A.

Let us suppose I have Thunderbolt (I really have 
one)  as a time/frequency source, but any other 
time-nuts recognized frequency source should by 
sufficient for the fun to drive old 50/60Hz stuff 
with the highest precision available (and for 
fun, comparable to www.leapsecond.com  solution, 
modulo cesium/hydrogen clock).  It would be very 
nice to see correction for leap seconds as well :-) :-)

Regards,

Cezary




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